1 68 Veieri7iary Obstetrics 



to four follicles of the size of a pea or small hazlenut. These do 

 not project beyond the surface of the gland, but occupy the place 

 of the vascular stratum, around which the external part of the 

 ovary continues to form a tissue capsule 3-8 mm. in diameter. 

 In isolated instances, also, the ovary ma}' undergo atrophy because 

 of the formation of abnormal follicles, until it becomes merely a 

 remnant, in which only a few small follicles can be distinguished. 

 Many times, in the sound portion of the surface of the ovary, 

 there are observed numerous follicles. 



In regard to the extremely variable thickness of the walls of 

 peripheral cysts, it is to be emphasized that, in many cases, their 

 walls are as thin as paper, consisting of a very delicate cuticle, 

 which is easily ruptured upon pressure ; in other cases, on the 

 contrary, there is a thickness of 6-8 mm., which explains the 

 fact that spontaneous rupture of the cyst may occur or that a 

 variable degree of force may be necessary in order to crush it. 



Analogous to the variations in the strength of the exterior 

 walls, there are also differences in the thickness of the sheath 

 walls of the ovarian tissue of the cyst in one and the same ovary, 

 ranging from 1-8 mm. 



According to the anatomo-histologic investigations of Simon, 

 already quoted, under the direction of our esteemed colleague, 

 Rubeli, in the Veterinary Anatomy Institute of this college, the 

 average volume and weight of the ovaries of 95 castrated cows 



was as follows : 



Right Ovary. Left Ovary. 



Maximum weight. __ 25.4 gr 20.3 gr. 



Medium weight 14-33 gr \o.\\ gr. 



Minimum weight. 6.8 gr_ 5.2 gr. 



Maximum length 7.0 cm 5.1 cm. 



Medium length 4.3 cm 3.71 cm. 



Minimum length i.o cm 2.1 cm. 



Maximum width 4.0 cm 3.8 cm. 



Medium width 2.8 cm 2.36 cm. 



Minimum width 1.7 cm 1.6 cm. 



Maximum thicknes.s 3.9 cm_ 3.9 cm. 



Medium thickness 2.53 cm 2.15 cm. 



Minimum thickne.ss 1.3 cm 1.3 cm. 



According to these tables the right ovaries are, on the aver- 

 age, greater than the left, both in weight and volume, a fact 

 which, concerning the size, can be readily determined by rectal 



